His refrigerator had sent in the list, and she had signed order to prove it

In the sentence "His refrigerator had sent in the list, and she had signed order to prove it," let's identify the participles and the nouns they modify:

1. Sent: This is the past participle of the verb "send." It modifies the noun "refrigerator."

2. Signed: This is the past participle of the verb "sign." It modifies the noun "she," but it is more accurately describing what "she" did in relation to the "order."

Thus, in summary:

• Sent modifies refrigerator.
• Signed modifies she related to the action of signing the order.